Purpose: The aim of the present study was to assess crestal bone resorption 5 years after loading by
conducting a clinical and radiographic evaluation of 112 Frialit-2 implants consecutively placed in 51
patients from January 1994 through June 1994. Materials and Methods: All implants were placed in
the same private-practice clinic by the same surgeon. Clinical assessment included plaque score monitoring,
bleeding on probing, probing depth, type of occlusion, and prosthetic adaptation. Intraoral
radiographs were taken and compared using suitable software to accurately measure peri-implant
bone resorption. Results: The survival rate of the implants was 100%. Plaque was present on 47
(42%) implants. Bleeding on probing was detectable at 17 implants (15.5%). Probing depth was 5
mm for 5 implants (4.5%). Crestal bone resorption was 3 mm for 32 implants (28.6%); the average
observed crestal bone resorption was 2.17 ± 1.6 mm. Discussion: The survival rate of the implants
may be the result of the relatively short functional period as well as the strict and frequent clinical
evaluations associated with oral hygiene procedures during the supportive periodontal therapy. Conclusion:
The results suggest that with strict plaque control, and provided that the patient follows a regular
program of supportive therapy, crestal bone resorption around a 2-stage implant system may be
limited. INT J ORAL MAXILLOFAC IMPLANTS 2004;19:597–602

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